Jack



C. SINTZ Nov. 18, 1952 JACK 2 SHEETSSHEET 1 Filed Nov. 5, 1945 INVENTOR.

CLAUDE SINTZ FIG.|.

ATTORNEYS Nov. 18, 1952 Filed Nov. 5, 1945 C. SlNTZ JACK 2SI'IEETS-SHEET 2 JNVENTOR.

CLAUDE SlNTZ BY /W ATTORNEYS Patented Nov. 18, 1952 UNITED. STATESPATENT OFFICE JACK Claude Sintz, Detroit, Mich. Application November 5,1945, Serial No. 626,669 2 Claims. (01. 2544100) The invention relatestojacks more particularly designed for use with motor vehicles and ofthat type adapted to be engaged with the bumper or other memberprojecting beyond the vehicle body. Jacks of this typehave heretoforebeen constructed but due to the different styles and various changes inbumper constructions, said jacks are not always adapted for engagementtherewith.

It is the object of the instant invention to obtain a construction whichis universally engageable with all of the various styles of bumpers ingeneral use as Well as others which may be hereafter designed.

It is a further object to obtain a construction which will eliminateobjectionable stresses on the jack due to the lifting pressure appliedthereto.

Still further it is an object to obtain an exceedingly simpleconstruction and one which can be manufactured at low cost. With theseobjects in view the invention consists in the construction ashereinafter set forth.

In the drawings:

Fig. 1 is a sectional elevation showing a jack of my improvedconstruction;

Fig. 2 is a transverse section on line 22, Fig. 1;

Fig. 3 is a plan view of the two-part lifting member;

Fig. 4 is .a similar view with the other removed;

Fig. 5 is a side elevation of Fig. 4;

Fig. 6 is a side elevation of the second part of the lifting memberdetached;

Fig. 7 is a side elevation of a modified construction of a two-partlifting member;

Fig. 8 is a plan view of one of the parts thereof;

Fig. 9 is a detached side elevation of the other part;

Fig. 10 is an end elevation thereof.

The general type of jack to which my improvements are applied includes abase plate A, a supporting rod 13 having its lower end pivotallyengaging a socket in said base plate and a lifting member C engagingsaid rod and adapted to be adjusted vertically upward thereon whileunder load. Different means have been used for adjusting the liftingmember vertically upward on the rod while under load but I shallillustrate only one of such means which consists in an external screwthread on the rod engaging an internal screw thread in the liftingmember. Thus, by rotating the rod as by means of a suitable crank Dengaging its upper end, the member C will be raised while under load.

As above described, motor vehicle bumpers are of one of said parts ofvarious cross sectional shapes so that it is difiicult to design alifting member which is engageable with all. Furthermore, the stressesdeveloped during the raising of the lifting member frequently react uponthe rod so as to distort the same. Such difficulties I have eliminatedin my improved construction which is as follows As shown in Figs. 1 to6, E is a member having an internally threaded sleeve portion E forengaging the external threads on the rod B. E is an arm projectinglaterally from the sleeve portion E and provided in its upper face nearits outer end with a spherical socket E. It is also provided withvertical slots E and E in diametrically opposite Walls of the socket Eand in the central plane of the sleeve portion E. F is another memberwhich is of a substantially V-shape form with a spherical lower end Ffor fitting Within the spherical socket E This member is furtherprovided with diametrically opposite projecting pins F and F forengaging the slots E and E The construction is such that the member F isuniversally pivoted in the socket E so that it can be rocked in anydirection but the pin F and F in engagement with the slots E and E willprevent rotation of the member F in said socket. Thus, the V-shaperecess in the member F will accommodate a great variety of crosssectional shapes of automobile bumpers, two of these being representedby dotted lines respectively at G and G. The member F will rock in itssocket while engaging the bumper so as to assume the best position forcarrying the load but after such engagement will remain in substantiallyfixed'relation in the member E. However, it may rock further ifnecessary to compensate for any angular movement of the bumper. Verticaladjustment of the member E is accomplished by rotating the rod B by thecrank handle D and any torque stresses transmitted to the member E willbe carried into the member F by the pins F and F Thus, as the member Fcannot turn due to its engagement with the bumper, it will anchor themember E and hold it also from turning. If it is desired to hold themembers E and F in permanent engagement with each other, this may beaccomplished by providing an aperture E through the arm E at the bottomof the socket E and extending a headed screw H through this apertureinto engagement with the member F.

The modified construction illustrated by Figs. 7 to 10 differs from thatpreviously described in the engagement between the two members of theload lifter. Thus, as shown a member I is similar to the member E inhavin a sleeve portion I for engaging the rod B and a laterallyextending arm 1 This arm is bifurcated to form a central slot 1 betweenthe furcations thereof and segmental recess bearings I are formed in thefurcations. A member J is similar to the member F but has segmentalportions J for rotatably engaging the bearings I. It is also providedwith a depending finger J extending through the slot I and a cotter pinK extending transversely through the lower end of the finger J preventsdisengagement of the member J from the member 1. Otherwise, theconstruction is substantially the same as that previously described.

What I claim as my invention is:

1. In a jack, the combination with an externally screw-threadedsupporting rod, of a load carrying member internally threaded forengagement with said rod to be vertically adjustable thereon by arelative rotation thereof, said member being provided with a laterallyextending arm having a socket near its outer end, a V-shaped member fordirectly engaging the load universally rockably supported on said arm insaid socket, and torque resisting means between said last mentionedmember and arm.

2. In a jack, the combination with an externally screw-threadedsupporting rod, of a load carrying member internally threaded forengagement with said rod to be vertically adjustable thereon by arelative rotation thereof, said member being provided with a bifurcatedlaterally extending arm having segmental bearings in the furcationsthereof, a V-shaped member for directly engaging the load havingsegmental portions for engaging said segmental bearings and a portionextending downward between the furcations of said arm, and a cotter pinextending through said portion beneath said furcations for holding saidV-shaped member attached to said arm.

CLAUDE SINTZ.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 995,583 Willour June 20, 19111,325,964 Templeton Dec. 23, 1919 1,342,057 Miller June 1, 19201,462,040 McKone July 17, 1923 2,149,248 Haferkorn Feb. 28, 19392,230,534 Elmer et a1 Feb. 6, 1941 2,259,789 Akins Oct. 21, 1941

